Ring binder mechanism

Abstract

A binder mechanism includes a rotatable support having ring segments that can be locked in a closed configuration. The binder mechanism includes a horizontal and/or a flush mounted push button that opens and/or unlocks the rotatable support. The push button acts on a ramped slider that causes the rotatable support to rotate open. An over-center arrangement aids in maintaining the binder mechanism closed or opened.

1 . A binder mechanism for binding articles, the binder mechanism comprising: 
 a base;    an elongate ring support rotatably mounted to the base, the elongate ring support comprising a plurality of ring members adapted to receive the article, the elongate ring support having an open configuration and a closed configuration; and    a locking arrangement comprising: 
 a locking tab disposed on the elongate ring support and extending laterally therefrom; and  
 an elongate slide lock slidably mounted relative to the base, the slide lock having a lock structure comprising: a lock detent defining a cavity thereunder constructed and arranged to receive the locking tab when the slide lock is in a first position so that the locking tab is held in the cavity by the lock detent and the elongate ring support is held in the closed configuration; and opening disposed adjacent the cavity constructed and arranged to cooperate with the locking tab such that, when the slide lock is moved to a second position and the locking tab is freed from the cavity, the locking tab can move into each opening to allow the elongate ring to rotate support toward the open configuration.  
   
   
   
       2 . The binder mechanism according to  claim 1 , wherein the slide lock comprises first and second lock structures and wherein the elongate ring support comprises corresponding first and second locking tabs laterally extending from the elongate ring support, each lock structure comprising the lock detent defining the cavity thereunder constructed and arranged to receive the corresponding locking tab when the slide lock is in the first position so that the corresponding locking tab is held in the cavity by the lock detent and the elongate ring support is held in the closed configuration; and the opening disposed adjacent the cavity constructed and arranged to cooperate with the corresponding locking tab such that, when the slide lock is moved to a second position and each locking tab is freed from the corresponding cavity, each locking tab can move into each opening to allow the elongate ring support to rotate toward the open configuration.  
   
   
       3 . The binder mechanism according to  claim 1 , wherein the slide lock comprises first, second and third lock structures and wherein elongate ring support comprises corresponding first, second and third locking tabs laterally extending from the elongate ring support, each lock structure comprising: the lock detent defining the cavity thereunder constructed and arranged to receive the corresponding locking tab when the slide lock is in the first position so that the corresponding locking tab is held in the cavity by the lock detent and the elongate ring support is held in the closed configuration; and the opening disposed adjacent the cavity constructed and arranged to cooperate with the corresponding locking tab such that, when the slide lock is moved to a second position and each locking tab is freed from the corresponding cavity, each locking tab can move into each opening to allow the elongate ring support to rotate toward the open configuration.  
   
   
       4 . The binder mechanism according to  claim 1 , wherein the lock detent includes a surface that is constructed and arranged to abut the locking tab when the slide lock is in the second position and the elongate ring support is in the open configuration.  
   
   
       5 . The binder mechanism according to  claim 2 , wherein each lock detent includes a surface that is constructed and arranged to abut the locking tab when the slide lock is in the second position and the elongate ring support is in the open configuration.  
   
   
       6 . The binder mechanism according to  claim 3 , wherein each lock detent includes a surface that is constructed and arranged to abut the locking tab when the slide lock is in the second position and the elongate ring support is in the open configuration.  
   
   
       7 . The binder mechanism according to  claim 1 , further comprising a spring disposed between the slide lock and the base, the spring biasing the slide lock toward the first position.  
   
   
       8 . The binder mechanism according to  claim 1 , further comprising an over-center spring and lever arrangement cooperating between the base and the elongate ring support and constructed and arranged to bias the elongate ring support toward a closed direction when the elongate ring support is at least partially in the closed configuration and to bias the elongate ring support toward an open direction when the elongate ring support is at least partially in the opened configuration.  
   
   
       9 . The binder mechanism according to  claim 8 , wherein the over-center spring arrangement comprises a protrusion disposed on the elongate ring support and a leaf spring disposed on the base, wherein the protrusion comprises first and second surfaces and an apex therebetween and wherein the leaf spring comprises corresponding first and second faces and a center therebetween, wherein the first face of the leaf spring biases the first surface of the protrusion toward the closed direction such that the elongate ring support is held in the closed configuration when in the closed configuration and wherein the second face of the leaf spring biases the second surface of the protrusion toward the open direction such that the elongate ring support is held in the open configuration when in the opened configuration.  
   
   
       10 . The binder mechanism according to  claim 1 , further comprising an opening mechanism cooperating with the slide lock and constructed and arranged to move the slide lock to the second position, the opening mechanism comprising a button and a lever arm pivotally mounted to the base in a manner whereby downward motion of the button results in upward motion of the lever arm.  
   
   
       11 . The binder mechanism according to  claim 10 , further comprising a cam rotatably mounted to the base and cooperating between the lever arm and the slide lock such that upward movement of the lever arm causes the cam to rotate and push on the slider lock toward the second position.  
   
   
       12 . The binder mechanism according to  claim 1 , wherein the base comprises a plurality of fixed ring members corresponding to and cooperating with the plurality of ring members of the elongate ring support.  
   
   
       13 . The binder mechanism according to  claim 1 , further comprising a cover constructed and arranged to cover at least a substantial portion of the base, the elongate ring support and the locking arrangement, wherein the cover is one of transparent and translucent.  
   
   
       14 . The binder mechanism according to  claim 1 , in combination with a binder.  
   
   
       15 . The binder mechanism according to  claim 1 , wherein the lock structure further comprises: a ramp disposed adjacent the cavity constructed and arranged to cooperate with the locking tab such that, when the slide lock is moved to a second position and the locking tab is freed from the cavity, the locking tab is urged by the ramp to rotate the elongate ring support toward the open configuration.  
   
   
       16 . The binder mechanism according to  claim 2 , wherein each lock structure further comprises a ramp disposed adjacent the cavity constructed and arranged to cooperate with the locking tab such that, when the slide lock is moved to a second position and the locking tab is freed from the cavity, the locking tab is urged by the ramp to rotate the elongate ring support toward the open configuration.  
   
   
       17 . The binder mechanism according to  claim 3 , wherein each lock structure further comprises a ramp disposed adjacent the cavity constructed and arranged to cooperate with the locking tab such that, when the slide lock is moved to a second position and the locking tab is freed from the cavity, the locking tab is urged by the ramp to rotate the elongate ring support toward the open configuration.  
   
   
       18 . The binder mechanism according to  claim 15 , further comprising an over-center spring and lever arrangement cooperating between the base and the elongate ring support and constructed and arranged to bias the elongate ring support toward a closed direction when the elongate ring support is at least partially in the closed configuration and to bias the elongate ring support toward an open direction when the elongate ring support is at least partially in the opened configuration.  
   
   
       19 . The binder mechanism according to  claim 16 , further comprising an over-center spring and lever arrangement cooperating between the base and the elongate ring support and constructed and arranged to bias the elongate ring support toward a closed direction when the elongate ring support is at least partially in the closed configuration and to bias the elongate ring support toward an open direction when the elongate ring support is at least partially in the opened configuration.  
   
   
       20 . The binder mechanism according to  claim 17 , further comprising an over-center spring and lever arrangement cooperating between the base and the elongate ring support and constructed and arranged to bias the elongate ring support toward a closed direction when the elongate ring support is at least partially in the closed configuration and to bias the elongate ring support toward an open direction when the elongate ring support is at least partially in the opened configuration.